It is a happy number.
12643159518 is a `hidden beast` number, since 1 + 2 + 6 + 43 + 1 + 595 + 18 = 666.
It is a congruent number.
It is an unprimeable number.
Almost surely, 212643159518 is an apocalyptic number.
12643159518 is a gapful number since it is divisible by the number (18) formed by its first and last digit.
It is a practical number, because each smaller number is the sum of distinct divisors of 12643159518, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15918529536).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
12643159518 is a wasteful number, since it uses less digits than its factorization.
12643159518 is an odious number, because the sum of its binary digits is odd.
The spelling of 12643159518 in words is "twelve billion, six hundred forty-three million, one hundred fifty-nine thousand, five hundred eighteen".